Yes, I found question 2 difficult for that reason. I eventually answered it based on what marriage means to me, because question 3 is expressly about what the legal position should be; but that one was also difficult to answer, because I think the state does need to get involved at least to the extent of helping people sort out any disputes about property, kids, next-of-kin roles, inheritance etc. That probably means having some default rules for marriage and/or civil unions, because I think the distinction between committed and uncommitted partnerships does matter somewhat when answering those questions. The default rules should be designed to accommodate as many consensual relationship structures as possible, though, and people should also be allowed to contract out of them and/or supplement them with pre-nups and such.